Non-operating (expenses) / income, net (Tables)

12 Months Ended

Mar. 31, 2019

Other Income and Expenses [Abstract]

Non-operating income / (expenses)

	Year Ended March 31,
	2017			2018			2019
	$ in thousands			$ in thousands			$ in thousands
Interest income		8			191			237
Interest expense		(37	)		(72	)		(139	)
Foreign exchange gain / (loss)		258			(353	)		(21	)
Non-operating income / (expenses), net		229			(234	)		77